Locomotive-cylinder structure



Nov. 1, 1927. 1,647,912

L. W. HANCE LOGOMOTIVE CYLINDER STRUCTURE Filed April 192g 4 Sheets-Sheet l NOV. 1, L. W. HANCE LOCOMOTIVE CYLINDER STRUCTURE Filed April 1. 1927 4 Sheets-Sheet 2 m rm L. W. HAN CE .LOGOMOTIVE CYLINDER STRUCTURE Nov. 1, 1927.

Filed April 1. 1927 4 Sheets-Sheet s .Illllll Nov. 1, 1927.

L. W. HANCE LOOOMOTIVE CYLINDER STRUCTURE- Filed April I. 1927 4 Sheets-Sheet 4 ill Patented Nov. 1, 192?.

UNITED STATES 1,647,912 earner caries.

tawnnncn w. nation, or rrriLAnnLrnrA, PENNSYLVANIA.

LOCOMOTI'VE-GYLINDER STRUCTURE.

Application filed April 1, 1927. Serial No. 130,220.

My invention relates to certain improvements in three-cylinder locomotives, in which the central cylinder is a high-pressure cylinder and the two side cylinders are low-pressure cylinders.

One object of my invention is to so design the cylinder structure or saddle that there are comparatively short passages from the valve-chest of the high-pressure cylinder-to the valve-chests of the low-pressure cylinders.

Another object of the invention is to so design the cylinder structure that the steam will enter the valve of the high-pressure cylinder directly through the central portion of the structure, while the two side cylinders will exhaust into outside pipes that lead into the nozzle in the smoke-box. By this con struction, the saddle contains only the low,

pressure live steam passages, which extend from the high-pressure valve-chest directly to the outside low-pressure valve.

A further object of the invention is to make the entire structure in a single casting.

ln the accompanying drawings:

Fig. 1 is a transverse sectional view through the cylinder structure showing the several, cylinders and their valve-chests, but omitting unnecessary parts;

Fig. 2 is a sectional plan view on the line 2-2, Fig. 1, the heads of the cylinders and valve-chests being omitted;

Fig. 3 is a sectional elevation through the high-pressure cylinder on the line 33, Fig. 1; and

Fig. 4 is a sectional view through the highpressure valve-chest and also showing the ports leading from the high-pressure valvechests to the low-pressure valve-chests, the section being taken on the line M, Fig. 1.

The cylinder structure 1 is preferably made as a single casting, but it will be understood that it can be divided, without departing from the essential features of the invention.

The lower portion of the structure is shaped so as to fit the frame of a locomotive, and the upper portion has a saddle 2 conforming to the shapeof the smoke-box of a locomotive, in which is an exhaust nozzle of any suitable type.

3 is the high-pressure cylinder which is centrally located, and t is a high-pressure valve-chest, being cylindrical in form in the present instance. 5 and 5 are the two lowpressure cylinders which extend beyond the frames of the locomotive, while the highpressure cylinders are midway between the frames. 1

Above the low-pressure cylinders 5 and 5 are the low-pressure cylindrical valve-chests t3 and 6", having exhaust ports connected to passages 7 and T", which in turn are coupled to outside exhaust pipes leading to the exhaust nozzle in the smoke-box of the locomotive. Thus the exhaust steam from the low-pressure cylinders is carried outside of the cylinder structure, and therefore the exhaust steam will not cool the walls of the cylinder structure through which the steam is passing.

8 is the steam inlet passage, which is coupled to a steam pipe leading from the boiler. and this passage leads to a central port 9 in the high-pressure valve-chest 4. The exhaust from this valve-chest flows to each end of the chest and into passages 10 communicating with end passages 11 of the low-pressure valve-chest 6, and with passages 19 leading under the high-pressure cylinder 3 to the end passages 13 of the low-pressure valvechest 6 Ports 13 lead from the highpressure valve-chest 4 to each end of the high-pressure cylinder 3, and ports 14 lead from the low-pressure valve-chest 6 to the low-pressure cylinder 5, while ports 1e lead from the low-pressure valve-chest 6 to the low-pressure cylinder 5.

By the above construction, it will be seen that the high-pressure valve is of inside admission type, and the low-pressure valves are of the outside admission type. This enables the steam to travel the most direct way from the high-pressure valve-chests to the lowpressure valve-chests, and also makes the exhaust steam travel from each low-pressure cylinder directly to the exhaust nozzle outside of the cylinder structure.

The ports are so arranged and formed. that a casting can be readily made, and is so designed that the structure will be substantial and can be readily formed in a single casting.

I claim 1. The combination in a cylinder structure for a three'cylinder locomotive, said structure being made as an integral casting and having a central high-pressure cylinder; a low-pressure cylinder at each side; and a high-pressure valve-chest adjacent to the high-pressure cylinder and having an inside admission port to which a steam pipe is dijacent to the high-pressure cylinder and having a central inlet port communicating di- 15 rectly with the steam pipe within the smokebox and having outside exhaust passages, the low-pressure valve-chests having outside admission ports communicating with outside exhaust ports of the high-pressure chcstthrough passages, one of said passages extending to each of the low-pressure cylinders; and central exhaust ports leading outside the; cylinder structure.

LAWRENCE W. HANCE. 

